Carbon nanotubes (CNTs) are allotropes of carbon having cylindrical nanostructure. Carbon Nanotube is a tube-shaped material made up of carbon molecule, having a diameter of approximately nanometer (one-billionth of a meter or one ten-thousandth of the thickness of a human hair). Carbon nanotubes has many different structure, depending on length, thickness and type of helicity (projection of the spin on direction of momentum), and number of layers. All the carbon nanotubes are made up of similar graphite sheet. However, electrical characteristic of the carbon nanotubes (acting as metals or semiconductor) depends on the structure it exhibits. Carbon nanotubes exhibit excellent mechanical strength, comparable to graphite. Thermal and electric conductivity property of carbon nanotube can replace various materials in wide range of application such as consumer goods, electrical and electronics, energy, healthcare, automobile, aerospace, and defense sectors. Other application where carbon nanotube technology can be used as includes, conductive plastics, flat-panel displays, gas storage, batteries with improved lifetime, technical textiles, antifouling paint and micro- and nano-electronics.